baber/WOPTO huggingface dataset:
Patent GB-438681-A (GB)
Title: Improvements in electrical musical instruments
IPC: G10H3/06
Filed: 1934-10-22
Abstract: 438,681. Electrical musical instruments. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and WINCH, G. T., c/o General Electric Co., Wembley, Middlesex. Oct. 22, 1934, No. 30239. [Class 88 (ii)] In a photo-electric instrument in which the notes are produced by moving light-beams traversing stationary wave-forms, a single source of light is used surrounded by as many optical systems in a plane as the number of slit-bearing rotary members producing the moving beams, the optical systems turning the light received by them into substantially parallel beams thus simplifying the gearing together of the rotary members. The source of light 1 is surrounded by lens systems 2 and inclined mirrors 3, one system and mirror for each rotary disc 4 bearing slits 5. The wave-forms 6 are arranged in fixed discs 7 and the key-controlled shutters 9 in other fixed discs 8. The light passing through the discs is concentrated by a common parabolic mirror 10, or by individual mirrors, on a single photo-electric cell. The position of the light-source may be standardized by the use of a jig. Specification 387,376 is referred to.
Patent GB-898957-A (GB)
Title: Means for recording operations of lifting apparatus
IPC: G07C3/12
Filed: 1958-09-22
Abstract: 898,957. Recording operations of machines. CHEMETRON CORPORATION. Sept. 22, 1958 [Oct. 11, 1957], No. 30253/58. Class 106 (4). [Also in Group XXX] A load-lifting apparatus, such as a fork lift truck, having an hydraulic system for raising and lowering a load supporting platform, is provided with means which is actuated by a pressure-responsive device in the hydraulic system to record the lifting and lowering operations, a delay means being provided to prevent recording of shock loads in the hydraulic system. As applied to a fork lift truck, Fig. 1 (not shown), on supplying hydraulic fluid under pressure to the lifting ram, a pressure switch in the supply line closes contacts of a time delay relay which, after a delay of ten seconds, actuated a second relay which then actuates a solenoid 50, Fig. 6, of the recording means, and an indicating lamp 52. A stylus-actuating armature 101 pivoted to the back wall 90 of the recording means housing, is connected to a pivoted arm 103 provided with a stylus 104 by a link 102. A chart disc 95 is supported on a shaft 94, which is mounted on the hinged front 91 of the housing and which is driven at a constant speed by a clockwork motor. In operation, starting at a radius 130, Fig. 11, on the chart, the stylus 104 rests against the chart at point 131 and makes a trace to point 136 when the solenoid 50 is energized, ten seconds after fluid pressure has been supplied to the lifting ram. This time delay prevents shock loads on the hydraulic system from being recorded. Similarly, the second relay incorporates a time delay which prevents shock reductions in the hydraulic pressure during lifting of a load from being recorded. The total distance travelled by the truck is also recorded on the chart 95 by a stylus 124 mounted on an arm 123 of a bell-crank lever the other arm 122 of which engages a cam 117 which is rotated through worm gearing on rotation of a shaft 110 connected to the prime mover of the truck by a flexible cable 22. The gearing is such that a single rotation of cam 117 producing a trace 132, 134, 135, Fig. 11, represents a suitable distance, such as five thousand feet, travelled. Forward and rearward movements of the truck are recorded cumulatively and a conventional odometer 121 is also provided. The stylus 104 may be replaced by a conventional counter.
Patent GB-227583-A (GB)
Title: Fire brick panel for furnace doors, covers, dampers, arches or the like, and processof manufacture of the same
IPC: F27D1/18
Filed: 1923-12-01
Abstract: 227,583. Sadler, A., (Compagnie des Mines, Fonderies et Forges d'Alais). Dec. 1, 1923. Casting processes. -In the manufacture of panels for furnace doors, covers, arches &c. by casting a metal frame around a fire-brick filling, the casting is so made that each individual brick is enclosed in a sub-frame integral with the main or outer frame. The bricks may be spaced apart in the mould or may be recessed as shown in Fig. 2, so that the webs 2 of the sub-frames do not extend through the thickness of the door.
Patent GB-223765-A (GB)
Title: Improvements in or relating to knives
IPC: B26B29/02
Filed: 1923-12-01
Abstract: 223,765. Pierce, T. Dec. 1, 1923. Table k n i v e s ; butchers' knives.- A table, butchers' or other knife is provided with a removable finger guard or protector formed out of a single piece of sheet metal &c. and comprising, a portion d<1> adapted to clip around the handle or handle ferrule c of the knife, a portion d<2> covering the back a<1> of the knife and side members d<3> which clip against the sides a of the knife blade; the lower edges d<4> of the members d<3> are preferably flat to prevent any tilting thereof and the forward ends are preferably reduced as shown.
Patent GB-1076537-A (GB)
Title: Diode parametric amplifier
Inventor: DAVIES ROBERT
IPC: H03F7/04
Filed: 1965-07-16
Abstract: 1,076,537. Parametric amplifiers. MULLARD Ltd. July 16, 1965, No. 30276/65. Heading H3B. A parametric amplifier has a plurality of varactor diodes D1, D2 connected between the central conductor T of a coaxial signal input line and a wall of a waveguide A, so that when the amplifier is operated with an idler frequency at or adjacent the self-resonant frequency of each diode then each diode isolates the other diode from the coaxial line at the idler frequency. A choke section U isolates the coaxial line from the pumping energy and also forms with the diodes a series resonant circuit at the signal frequency. Section W is an impedance transformer. At the idler frequency each diode forms a parallel resonant circuit which thus presents a high impedance in series with the other diode and the signal source. In a modification the coaxial choke and transformer are replaced by a low-pass filter formed in three sections, each one quarter wavelength long at the pump frequency, together with a fourth section one quarter wavelength long at the signal frequency. The diode assembly is connected at one end to the low-pass filter and at the other end to a coaxial short-circuit stub of adjustable length. In order to tune the diodes to exact resonance at the idler frequency a PTFE tuning plunger is provided adjacent each diode. If broadbanding is desired the diodes can be tuned to slightly different frequencies, and broad-banding tuning stubs may be provided in the coaxial line. A broader band-width may be obtained by stagger-tuning three or more diodes. The bandwidth may also be increased by using two similar, but not identical, diodes.
Patent GB-459400-A (GB)
Title: Scanning means and method
IPC: H04N3/34
Filed: 1935-11-02
Abstract: 459,400. Television. FARNSWORTH TELEVISION, Inc., 505, Crocker Building, 620, Market Street, San Francisco, U.S.A. Nov. 2, 1935, No. 30344. Convention date, Nov. 5, 1934. [Class 40 (iii)] The framing saw-tooth oscillation A, Fig. 4, is combined with a square-topped wave B to produce an oscillation C which produces intercalated scanning. Alternatively, the square-topped wave may be replaced by a saw-tooth wave, the line and frame oscillators being then interlocked. The line and frame oscillators are interlocked by an interconnection of an oscillator operating on a common harmonic. Specification 423,101 is referred to.
Patent GB-698552-A (GB)
Title: Improvements in and relating to electric thermostats
Inventor: SHEPHERD GEORGE RONALD
IPC: G05D23/275
Filed: 1950-12-12
Abstract: 698,552. Thermal switches. RHEOSTATIC CO., Ltd. Oct. 18, 1951 [Dec. 12, 1950], No. 30373/50 Class 38 (v) [Also in Group XIII] The operating temperature of a capsule-operated switch is adjustable by varying the loading of a spring 19 having a non-rotatable seating 14 with projections 15 engaging in cam-shaped openings in a tube 12, which may be rotated by a pointer 17 co-operating with a scale 18. The capsule 1 carries the other spring seating 10 which carries an adjustable screw 20 which actuates a contact-carrying arm 22 mounted on the centre of a flat blade 21 fixed at its ends. In order that the capsule may operate at sub-atmospheric pressures, it may contain an auxiliary compression spring, Fig. 4 (not shown), opposing the spring 19, or the resilience of the capsule may replace such auxiliary spring, or it may contain a quantity of a pure gas.
Patent GB-299068-A (GB)
Title: Piston for pneumatic hammers
IPC: B25D17/06
Filed: 1928-10-20
Abstract: 299,068. Schmidt, A., and Untersteller, A. Oct. 20, 1928. [A Specification was laid open to inspection under Sect. 91 of the Acts, Oct. 22, 1928]. Piston packing.-In a piston for a pneumatic hammer in which the packing- ring 2 is adjusted for wear by means of radial pins 3 acted on by the conical end of a screw 4, the head of the screw is in the form of a plate having holes 5a which are engaged by a spring-pressed locking pin 7. The latter is held back during adjustment ot the screw, by means of a wire passed through a hole 8 and engaging notches 7a in the pin.
Patent GB-1300362-A (GB)
Title: Adjustable hairpiece and fasteners
Inventor: GOLDBERG EUGENE J
IPC: A41G5/00
Filed: 1971-06-29
Abstract: 1300362 Hairpieces E J GOLDBERG M W KRAMER and J R LICCI 29 June 1971 [13 July 1970 25 May 1971] 30474/71 Heading A4V [Also in Division E2] A hairpiece which may be secured to a person's natural hair and readily reposition comprises strands of hair and at least one fastener 15 which has a bore 19 through which the natural hair can be threaded and which has retaining means to secure the fastener at any position along the threaded hair. The retaining means is a rubber grommet 26 which is placed on the tongue 17 of the fastener by a tool 25. As the outer sleeve 27 of the tool is pushed towards the fastener the grommet is forced along the projection 32 and onto the tongue where it holds the hair against the tongue. The position of the fastener may be altered by removing the grommet and repositioning the fastener along the threaded hair before replacing the grommet. A tool having a hook at one end may be used to thread the natural hair through the bore. The strands of hair forming the hair piece may be attached directly to the base 16 of the fastener or may be attached to a piece of "touch and close" tape which engages a similar piece of tape to which the fasteners are attached. In the latter case the tape may be attached laterally to the hair piece and as the natural hair grows two fasteners attached to the hair can be attached nearer to the centre of the tape on the hair piece. This makes the need to reposition the fasteners on the natural hair less frequent.
Patent GB-917859-A (GB)
Title: Liquid spraying apparatus
IPC: B05B7/04
Filed: 1960-09-05
Abstract: 917,859. Spray-producers. FINN, M. J. May 11, 1961 [Sept. 5, 1960], No. 30571/60. Class 69 (3). A solid jet of water or other liquid from a nozzle 2 crosses an air gap before flowing into the inlet end of a coaxial tubular part 4 comprising a Venturi passage into the throat 7 of which a second liquid, e.g. an insecticide, is drawn by the flow of water ; the liquid mixture is sprayed from a nozzle 9. The parts 2 and 4 are mounted on a bar 1, and the second liquid is drawn from a reservoir 16 via a flexible pipe 15 and a rigid connector 19. A vent 14 is closed by a finger of the operator when flow of the second liquid is required, the rate of feed of which may be controlled by a metering jet in its flow passage.
Patent GB-810384-A (GB)
Title: An auto-self-excited transductor
IPC: H01F29/14
Filed: 1955-10-28
Abstract: 810,384. Magnetic amplifiers. LICENTIA PATENT-VERWALTUNGS-G.m.b.U Oct. 28, 1955 [Oct. 30, 1954], No. 30886/55. Class 40 (9). An auto-self-excited transductor has a common control and feedback circuit in which a rectifier 29 is biased by the control voltage 30, the circuit providing a negative feedback current path through each transductor main winding 25, 26 during their respective quiescent periods. In each operating cycle, the period during which load current flows through a main winding depends on the initial magnetic state of the associated core as established by the demagnetizing feedback current, the duration of this reverse current being determined by the control voltage bias of the rectifier 29. The arrangement may be applied to an auto-selfexcited parallel transductor, Fig. 4, supplying a load 31, or to an auto-self-excited bridge rectifying transductor, Fig. 5, in which the rectifier 29 is biased in a forward direction by a voltage source 34. In an auto-self-excited transductor, Fig. 6, supplying a D.C. load 31 from a threephase supply and comprising main windings 24- 26 and self-excitation rectifiers 23, 27, 28, the feedback circuit consists of rectifiers 35-37 and the D.C. controllling voltage 30. The control voltage may be provided by a generator, amplidyne, metadyne or tachometer generator and may be combined with an alternating voltage applied by way of a transformer or generator.
Patent GB-1494807-A (GB)
Title: Process for the manufacture of carbon tetrachloride
IPC: B01J27/10
Filed: 1975-07-24
Abstract: 1494807 Carbon tetrachloride PRODUITS CHIMIQUES UGINE KUHLMANN 24 July 1975 [29 July 1974 8 Jan 1975] 31017/75 Heading C2C Carbon tetrachloride is prepared by chlorination of C 2-4  aliphatic hydrocarbons or their chlorinated or oxygenated derivatives or mixtures thereof at 1-10 bars pressure at up to 160 C. at atmospheric pressure or up to 200 C. at pressures higher than atmospheric, to produce a perchlorinated product containing >70% Cl and then effecting a chlorolysis of the said product by evaporation at >250 C. in the presence of excess Cl 2  and heating the vapours at 450-600 C. for #2 seconds together with the vapours of chlorinated products CxCly where x is 1-6 and y = 4-12, in the presence of a metallic chloride catalyst in a reactor maintained at 1-10 bars pressure. The catalyst is preferably a volatile chloride of a Group VA, VIB or VIIB metal, e.g. MoCl 5  and is preferably used in an amount of 5-50 g/kg. of chlorinated product recycled to the chlorolysis. The chlorolysis may be performed in a reactor with fixed support or fluidized bed of a porous support. Residues from the manufacture of vinyl chloride, ethylene and propylene oxides and chloroprene are suitable for use in the present process.
Patent GB-1450857-A (GB)
Title: Cutting tool for producing profiles
IPC: B23D13/02
Filed: 1974-07-12
Abstract: 1450857 Cutting tools SAACKE KG Gebr 12 July 1974 [27 July 1973] 31270/74 Heading B3K A cutting tool for cutting profiles on turbine blade roots comprises a rotary table 4, a transverse slide 3 mounted on said table, and at least two groups of cutting blades 1a-1o mounted at different radial distances from the centre of rotation of the table with the blades spaced along cutting ares 5, 6 and at different heights from the table 4, each blade being adjustably revolvable about its own axis, whereby inner and outer profiles are cut on the blade root. Cutting blades 1f and 1g are coaxially mounted at the same location. Each cutting blade is removable for regrinding.
Patent GB-465735-A (GB)
Title: Improvements in or relating to heating apparatus for bitumen, tar or the like
IPC: C10C3/12
Filed: 1935-11-12
Abstract: 465,735. Tar &c. boilers. JOHNSTON BROS. (CONTRACTORS), Ltd., and LAMB, P. G. Nov. 12, 1935, No. 31292. [Class 107] A cauldron 10 for tar, bitumen, and the like has, in its base, an inwardly projecting part 11 forming a chamber for the heated gases of the furnace 12 and is provided with an upright baffle 15 surrounding the projecting part of the base. This baffle terminates short of the lower part of the cauldron and extends above the projecting part 11. The bitumen or the like may be fed from barrels 22 to a pre-heating chamber 16 which is fitted with strainers 23. This chamber is heated by a separate furnace or by flue pipes 19 leading from the projecting part 11 to the chimney 20. The heated material passes over a weir 17 and through a strainer 18 into the cauldron, the base 13 of which slopes downwards towards an outlet 14. Thence the material flows upwardly into the space enclosed by the baffle, whence it is withdrawn by a discharge-pipe 24 having a filter 25.
Patent GB-604025-A (GB)
Title: Improvements in tablet stands for educational purposes
IPC: A47B23/00
Filed: 1945-11-21
Abstract: 604,025. Adjustable stands. MATHAMS, A. M. Nov. 21, 1945, No. 31318. [Class 52(iii)] An educational appliance comprises a pair of stands 4 provided with uprights 3 having telescoped therein vertical members 5 which may be secured in position by means of locking pins 6. A horizontal axle 7 is pivoted between and lockable to the vertical members 5 by means of nuts 9 and carries a rotary tablet 8 which may be clamped at a desired angle on the axle by means of lock nuts 10. One side of the tablet 8 is provided with flexible straps for holding a book while the reverse side may be used as a blackboard. The stands may have pivotally attached thereto a cabinet 11, and eye bolts 13 are provided on members 5, also the axle 7 may carry playing discs 15. In a modified form of construction the telescopic members are tubular.
Patent GB-1535387-A (GB)
Title: Flexible printed circuit assemblies and methods of making such assemblies
IPC: H05K3/00
Filed: 1976-07-27
Abstract: 1535387 Making printed circuits BURROUGHS CORP 27 July 1976 [28 Aug 1975] 31340/76 Heading H1R In a method of making a flexible printed circuit assembly including rigid connectors 52, 54 connected by a flexible cable section 60 whereon conductors 50 run continuously, an opening is made in a rigid support member 22 corresponding in shape to that desired of the flexible section 60. A filler block 32 is inserted into the opening and metallic-clad insulation film is adhesively bonded to both surfaces of the rigid support but does not adhere to the chosen material of the block 32, e.g. of PTFE. Conductors 50 are formed by etching the metallic cladding 46, 48, e.g. of Cu, so as to terminate on portions 52, 54 of the support intended as the rigid connectors in enlarged pads 56. A cover layer 58 is applied to the intermediate section covering the block 32 and peripheral portions of the rigid support 22 are cut away, e.g. by stamping. The filler block 32 is then slipped out from between the conductor-carrying insulating films thus leaving the two rigid connectors 52, 54 connected by flexible cable sections 60. The metallic-clad films are bonded to the support 22 by a thermosetting epoxy adhesive.
Patent GB-792821-A (GB)
Title: Improvements relating to textile double-twist cabling spindles
IPC: D01H7/86
Filed: 1955-11-02
Abstract: 792,821. Double twist spindles. VEREINIGTE GLANZSTOFF-FABRIKEN AKTGES. Nov. 2, 1955 [Nov. 8, 1954], No. 31344/55. Class 120(2) In a textile double-twist cabling spindle having storage disc and a rotating lower delivery cap the storage disc comprises a peripheral ring which is fixed on a support member and has two rows of staggered protuberances arranged on the outer surface thereof and the lower delivery cap has a overhanging portion extending down as far as the middle of the outer surface of the ring. In the arrangement shown the storage disc consists of a supporting element 4 and a ring 5 the latter having on its external surface a number of hemispherical protuberances 8 and 9 arranged staggered relatively to one another. The delivery cap 6 has an overhanging portion 10 which extends downwardly to about the middle of the outer surface of ring 5. In operation yarn travels from the supply bobbin (not shown) down through the hollow shaft of the spindle core 3 and out through an opening 2. It then passes through a slot 12 in the support member 4 through an opening 13 in the ring 5 on to the outer surface thereof between protuberances 8 and 9. The degree of sliding friction and therefore the tension in the yarn is dependent on the amount that the protuberances 8 extending into the intesties between the protuberances 9. The protuberances may have other forms such as ellipsoidal, paraboloidal, pyramidal or conical. Specifications 758,055 and 776,400 are referred to.
Patent GB-937100-A (GB)
Title: Electrically-operated toothbrush
Inventor: FRESARD MARCEL
IPC: A61C17/22
Filed: 1962-08-15
Abstract: 937,100. Toothbrushes. ETABLISSEMENTS AESUP. Aug. 15, 1962, No. 31357/62. Class 19. A diaphragm 7 has liquid-tight connections with section 5 of oscillable shaft 4 of an electrically driven toothbrush and with the annular space between ring 9 and plastic motor casing 1 and is protected by an end portion of the casing having drainage apertures 13, 13a to enable this portion to be rinsed out. The casing 1 is completely sealed and the motor switch is operated by depressing resilient bulges 3. The diaphragm 7 may be of neoprene and, in another form (Fig. 4, not shown) it is unpleated and extended to below bulges 3, the aperture 13 having correspondingly lowered. U.S.A. Specifications 2,917,758 and 3,088,148 are referred to.
Patent GB-489161-A (GB)
Title: Improvements relating to colour photography
Inventor: WILHELM SCHNEIDER
IPC: G03C7/32
Filed: 1936-11-17
Abstract: Silver halide emulsion layers contain colour formers which have the residue of a dyestuff component occurring as a colour forming group several times periodically.  The colour former is obtained by condensation of a dyestuff component with formaldehyde or a derivative thereof, a dialcohol, or with thionyl chloride. Examples of dyestuff component include acetoacetic ester, bromacetoacetic ester, acetoacetic anilide, cyanoacetic ester, benzoylacetoacetic ester, benzoylacetic acid anilide, terephthaloyl acetic ester, hydrindenes, pyrazolones, coumaranone, malonic acid anilide, o -cycanoacetophenone, hydroxythionaphthene, phenols, substituted naphthols, phenol carboxylic acids, naphtholcarboxylic acids and certain hydroxy compounds of benzene and naphthalene derivatives. The colour former may contain the residues of different dyestuff components. Meta-cresol and formaldehyde are condensed to yield a polymeric diphenylmethane derivative which yields in colour development a blue colour.  Pyrazalones yield colour formers for red. The following examples of the preparation of colour formers are given: (1) paracresol dialcohol and meta-cresol in glacial acetic acid are gradually added to concentrated sulphuric acid and glacial acetic acid.  The mixture is allowed to stand and then precipitated by hot water.  The product is dissolved in caustic soda lye and added to the emulsion; (2) para-cresol dialcohol and 1-p-oxyphenyl-3-methyl-5-pyrazolone; para-cresol dialcohol and benzoylacetic - 4 - oxyanilide; meta-cresol and benzaldehyde; meta-cresol and diphenyldialdehyde can all be condensed in a manner similar to that in (1) to yield colour formers; (3) 5 grams paraldehyde in 60 cc. glacial acetic acid 2,8 cc. sulphuric acid is run slowly into a mixture of para-cresol and metacresol and the condensation product precipitated and reprecipitated with hydrochloric acid and hot water.  It is then added to the emulsion as before; (4) meta-cresol and para-cresol are stirred into sulphuric acid at 0 DEG  C., the mixture further cooled and 120 grams of thionyl chloride added.  The mixture is poured on ice and then purified by solution in caustic soda and reprecipitation with acetic acid.  Specifications 475,191, [Group XX], 436,587; 458,400, 465,823, [both in Group XX], 468,946; 479,838, 481,048, 481,501, and 488,853, [all in Group XX], are referred to.